Pbinting tabulator



July so, 1940.-

L. P. CROSMAN PRINTING TABULATQR 2 Sheets-Sheet 1 Filed Nov. 9. 1959 mgmm\ .1 i n uwmufl $3.!

I INVENTOR Loring Bi, Crag "nan zz ATTORNEY Patented My so, 19402,209,512 PRINTING TABULATOR Application November 9, 1939, Serial No.303,567

4 Claims. (01. 197-176) The invention has relation to printingtabulators', being shown as applied to the tabulating mechanism of alisting calculator constructed in accordance with the disclosure of U.S. Patent No. 1,946,572, issued to the present applicant on February 13,1934.

The invention consists in the novel construction and combination ofparts, as set forth in the appended claims.

In the accompanying drawings, illustrating the invention:

Fig. l is a rear elevation of a listing calculatingmachine to which theinvention is applied, the casing being removed and parts broken away.

Fig. 2 is a rear elevation of certain parts shown in Fig. l, in positionassumed during the tublation of the platen carriage.

Fig. 3 is a detail elevation of the governor and associated parts.

Fig. 4 is a detail-elevation of certain parts operated when the carriagereaches its extreme left hand position.

Fig. 5 is a detail of certain parts shown in Fig. 4, located in normalposition.

Fig. 6 is a detail perspective view of the'latch preventing operation ofthe governor.

The platen carriage of the machine is tabulated from right to left underthe influence of a spring drum 8 (Fig. 1) connected to the carriage by atape 9, the carriage being held in its various tabulated positions bymeans of a notched bar i mounted in the carriage, the walls of thenotches forming spaced stops I93 engageable successively by the end 6 ofa detent i.

In the present instance detent I is pivotally supported on a leverfulcrumed upon a ipring tensioned arm 5| forming a yieldable extensionof the stationary machine frame. The free end 6 of detent I is heldupwardly, in contact with the stop face I93 by means of a spring urgedarm 62, connected to the detent by link 63. The detent is disengagedfrom bar I by downward movement of a member I85, operated in knownmanner. Upon release of bar I by the end 6 of the detent the carriagewill be pulled 'to the lett by the spring drum 8, and the detent, beingreleased by themember I85, will rise under bar I. The carriage havingmoved sufiiciently to bring one of the notches 2 of bar I into registerwith.

s t-ion. for which purpose lever 60 and detent i will be moved to theright when the detent is. released from bar I, and after engagement ofthe detent with the wall of the next notch 2 the final movement of thecarriage into tabulating position will be resisted by a braking forceapplied to the lever 5E3.

Lever St is therefore connected to a ratchet disk' 66 by means of a link65, said disk ratcheting v idly under the pawls 66 in the movement 60 tothe right, this movement being efiected un-= der the influence of aspring 61, attached at one end to disk and at the other end to theframing of the machine. Upon movement of lever 60 to the left, under theinfluence of spring drum 8,

link 65 will rotate disk 54 from the position shown in Fig. 2 into thatof Fig. 1, and the ratchet teeth of the disk will engage the pawls 66 torotate a gear wheel 68, on which the pawls are mounted. Gear 68 isconnected through gearing centrifugal governor comprising pivoted armsF3 and brake shoes it attached to said arms and operating upon astationary braking surface iii.

of lever w .69, Hi, 1: (Figs. 1 and s) with the shaft 12 of a Thus thefinal movement of the platen carriage a; into the new tabulatingposition will move detent 7 and lever 68 to the left, rotating thegovernor and bringing the brake shoes it into contact with the surface'55, to arrest the carriage movement gradually. In order to keep theaction of the governor even the diminishing speed of the 30 carriage iscompensated by a relative speeding up of the governor, the link 65 andthe lever having a toggle action in moving from the position of Fig. 2to that of Fig. 1, for this purpose. A

bers fill-and 65 consists in the fact that the minimum resistance tomovement of the carriage is exerted at the beginning of the movement, so

further advantage of the toggle action of memthat detent I will beengaged by the stop face 40 I93 quietly and without shock.

A second toggle is formed by link 65 and disk 64, working oppositely tothe first named toggle, in that the movement of lever 60 from theposition illustrated in Fig. 2 to that of Fig. 1 will be increasinglyresisted by the braking action of the 45 governor, because the toggle6t, .65 will be moving from approximately right angular position intothe approximately dead center position illustrated in Fig. 1. Thus thetoggle 6t, 65 will be loaded by the governor and the carriage will bebrought to rest in an approximately harmonic movement by a substantiallyuniform resistance, having the advantage over a spring loaded toggle ofproviding resistance of a non-elasticcharacter, 55-

' whereby the carriage will be stopped at a definite point when thetoggle is open, and whereby any rebounding tendency will be eliminated.

Since the lever 39 is mounted on the yieldable arm 9|, shock willbe'taken up in case pressure shaft I99 is also provided with an arm I6(Figs. 1

and 4) having toggle spring connection 11 with a go crank arm 18 of studshaft I9. Shaft I9 is also provided with an oppositely extending crankarm 89, as seen in Fig; 6, this arm normally lying out of the path ofmovement of 9. lug 8| of the link I g 63. Upon displacement of rollerI9'I by cam I96, 2; arm 89 will be brought into the path of move- 'mentof lug 8| and movement of detent 'I and lever 69 to the left willthereby be prevented.

As the carriage reaches its extreme right hand position a cam similar tothe cam I96, but oppogp, sitely disposed (as seen in Patent- No.1,946,572),

will engage roller I91 and return the parts to normal position,disengaging crank arm 89 from link 33. During this reverse movement ofthe platen carriage a beveled face of the end 6 of de- 35 tent I willengage the walls of the notches 2 of bar I, and the detent will becammed downward, out of said notches. As the carriage is released from'the urge of the r'eturn mechanism, 'the wall I93 of the. first notch[will be engaged by detent I and the carriage held in its firsttabulating position.

According to. the disclosure of Patent No.

1,946,572,- certain operations of the machine are automaticallyinitiated whenever the car- 3 'riage is brought to rest in a newtabulating position, modified mechanism for this purpose being providedto cooperate with the parts of the present invention.

The desired operations are accomplished by 5 0. the engagement of aclutch 24 (Fig. 1) whereby movement of-a motor driven shaft 41 will be'transmittedto a shaft 56. Clutch 24 is normally held in disengagedposition by means of a detent 39, formed on a lever 33, ifulcrumed at 49and provided with a pin 31 lying in the path of move.-

ment of an arm 36 of lever 33, which is fulcrumed at 34 on the framingof the machine. Lever 33 has engagement with one of a lever 82, theother 'armof which is provided with a lug nora mally engaging a latch33.A latch release member 94 is pivoted concentrically with the pivot ofthe latch, the two members being urged toward contacting position by asuitable spring. In the releasing member 84 is held in contact with thelug 3|. of link 63 by. a spring 35. Upon movement of the parts-into theposition illustrated in Fig. 2 lug 3| will be withdrawn from member 34and spring 95 will move latch 93 out of contact with ;the lug of lever92, and a spring 35 will displace the levers 33 and 82 sufliciently tobring said lug below the shoulder of latch 33, resting upon a shoulderof the member 84. Upon movement of "the parts back from the positionillustrated in f" Fig. 2 to that of Fig. 1, lug 8| will contact withnormal position of the: parts the free end of themember 34. moving theshoulder thereof out of engagement with the lug of lever 32, whereuponspring 35 will bring the .arm 36 of lever 33 against pin 31, raisingdetent 39 and allowing the clutch 24 to engage.

Near the end of the cycle of movement of clutch 24, a cam 21", mountedon a disk 55, fast to said clutch will contact with a roller 292 mountedupon lever 293, 'fulcrumed at 49, rocking said lever and thereby throughlink 294 moving lever 33 back to normal position, latch 93 now engagingunder the ing of lever 82 to hold the partsin normal position. This willallow the clutch detent 39 to move into engaging position, under theinfluence of a spring 295, and release the clutch, terminating thespecial operationreferred to.

I claim:

1. In a printing tabulator, the combination witha power urged platencarriage having spaced stops, a stationary frame, and a. releasabledetent supported from said frame and adapted to engage said stops; of anautomatically governed brake, and connections between said detent andthe brake, adapted toallow a limited movement of the detent uponengagement thereof with a stop during tabulation, including variableleverage elements adapted to efiect substantially har-' monicdeceleration of said movement of the detent during uniform rate movementof the brake.

2. In a printing tabulator, the combination with a power urged platencarriage having spaced stops, a stationary frame, and a releasabledetent supported from said frame and adapted to engage said stops; of anautomatically governed brake, and connections between said detent andbrake, adapted to allow a limited movement of the detent upon engagementthereof with a stop during tabulation, including toggle elements adaptedto effect substantially harmonic deceleration of said movement of thedetent during uniform rate movement of the brake. 3. In a printingtabulator, the combination with a power urged platen carriage havingspaced stops, a stationary frame, and a releasable detent supported fromsaid frame and adapted to engage said stops; of an automaticallygoverned brake, connections between said detent and the brake, adaptedto allow a limited movement of the detent upon engagement thereof with astop during tabulation, including variable leverage elements adapted toeifect substantially harmonic deceleration of said movement of thedetent during uniform rate movement of the brake, and spring meansoperative to impart opposite movement to said detent upon release froma'stop.

4. In a printing tabulator, the combination with'a power urged platencarriage having spaced stops, a stationary frame, and a releasabledetent supported from said frame and adapted to engage said stops; 'ofan automatically governed brake, connections between said detent and thebrake, adapted to allow a limited movement of the detent upon engagementthereof with a stop during tabulation, including variable leverageelements adapted to effect substantially harmonic deceleration of saidmovement of the detent during uniform ,rate movement of'the' brake, saidconnections also including pawl and ratchet ele-- nients, and springmeans operative to impart oppositemovement to said detent upon releasefrom a stop.

mama momma caosMAN.

